Description

Benzoylamido-4'-Aminostilbene-2,2'-Disulfonate is a high-purity, synthetic organic compound belonging to the stilbene derivative class. This product is valued for its role as a key intermediate and functional additive in advanced material synthesis and specialty chemical manufacturing. It is primarily sought by industrial and research sectors involved in the development of optical brighteners, liquid crystal displays (LCDs), and photoactive polymers. Our supply ensures consistent quality and reliable availability for global B2B procurement.

Application

• Primary intermediate in the synthesis of optical brightening agents (OBAs) and fluorescent whitening agents for paper, textiles, and detergents.
• Key building block for photoalignment materials used in the production of liquid crystal displays (LCDs).
• Functional monomer or additive in the development of advanced polymeric materials with specific optical or electronic properties.
• Research chemical for investigating photophysical and photochemical processes in academic and industrial R&D laboratories.
• Potential precursor for dyes and pigments requiring high light-fastness and chemical stability.
• Specialty additive in formulations for coatings and inks where specific optical characteristics are desired.

Basic Information

Product Name	Benzoylamido-4'-Aminostilbene-2,2'-Disulfonate
CAS No.	25431-18-9
Molecular Formula	C21H16N2O8S2
Molecular Weight	488.49 g/mol
Synonyms	4,4'-Bis[(4-benzoylamino)styryl]stilbene-2,2'-disulfonate; 4,4'-Bis[(4-benzamido)styryl]stilbene-2,2'-disulfonic Acid Disodium Salt; Fluorescent Brightener ER; Tinopal ER; Stilbene Brightener ER; 4,4'-Bis[(4-benzoylamino)styryl]biphenyl-2,2'-disulfonate; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[(phenylcarbonyl)amino]phenyl]ethenyl]benzenesulfonic Acid] Disodium Salt
EINECS	Contact for details

Quality Control

Our Benzoylamido-4'-Aminostilbene-2,2'-Disulfonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.